Following is what my server log shows.
2014-01-25 05:24:45,367 18276 WARNING HVLSnew openerp.modules.module: module crm_helpdesk: module not found
2014-01-25 05:24:45,368 18276 WARNING HVLSnew openerp.modules.module: module crm_helpdesk: module not found
2014-01-25 05:24:45,368 18276 WARNING HVLSnew openerp.modules.module: module crm_helpdesk: module not found
2014-01-25 05:24:45,368 18276 WARNING HVLSnew openerp.modules.graph: module crm_helpdesk: not installable, skipped
2014-01-25 05:24:45,369 18276 WARNING HVLSnew openerp.modules.module: module portal_claim: module not found
2014-01-25 05:24:45,371 18276 WARNING HVLSnew openerp.modules.module: module portal_claim: module not found
2014-01-25 05:24:45,371 18276 WARNING HVLSnew openerp.modules.module: module portal_claim: module not found
2014-01-25 05:24:45,371 18276 WARNING HVLSnew openerp.modules.graph: module portal_claim: not installable, skipped
2014-01-25 05:24:45,380 18276 WARNING HVLSnew openerp.modules.graph: Some modules were not loaded.
2014-01-25 05:24:45,381 18276 INFO HVLSnew openerp.modules.loading: loading 77 modules...
2014-01-25 05:24:45,391 18276 WARNING HVLSnew openerp.modules.module: module sale_journal_sequence: module not found
2014-01-25 05:24:45,391 18276 WARNING HVLSnew openerp.modules.module: module sale_journal_sequence: module not found
2014-01-25 05:24:45,391 18276 WARNING HVLSnew openerp.modules.module: module sale_journal_sequence: module not found
2014-01-25 05:24:45,391 18276 WARNING HVLSnew openerp.modules.graph: module sale_journal_sequence: not installable, skipped
2014-01-25 05:24:45,397 18276 WARNING HVLSnew openerp.modules.graph: Some modules were not loaded.
2014-01-25 05:24:45,398 18276 INFO HVLSnew openerp.modules.loading: loading 77 modules...
2014-01-25 05:24:45,401 18276 WARNING HVLSnew openerp.modules.module: module crm_helpdesk: module not found
2014-01-25 05:24:45,401 18276 WARNING HVLSnew openerp.modules.module: module crm_helpdesk: module not found
2014-01-25 05:24:45,403 18276 WARNING HVLSnew openerp.modules.module: module crm_helpdesk: module not found
2014-01-25 05:24:45,403 18276 WARNING HVLSnew openerp.modules.graph: module crm_helpdesk: not installable, skipped
2014-01-25 05:24:45,403 18276 WARNING HVLSnew openerp.modules.module: module portal_claim: module not found
2014-01-25 05:24:45,404 18276 WARNING HVLSnew openerp.modules.module: module portal_claim: module not found
2014-01-25 05:24:45,404 18276 WARNING HVLSnew openerp.modules.module: module portal_claim: module not found
2014-01-25 05:24:45,404 18276 WARNING HVLSnew openerp.modules.graph: module portal_claim: not installable, skipped
2014-01-25 05:24:45,407 18276 WARNING HVLSnew openerp.modules.graph: Some modules were not loaded.
2014-01-25 05:24:45,407 18276 INFO HVLSnew openerp.modules.loading: loading 77 modules...
2014-01-25 05:24:45,411 18276 WARNING HVLSnew openerp.modules.module: module sale_journal_sequence: module not found
2014-01-25 05:24:45,413 18276 WARNING HVLSnew openerp.modules.module: module sale_journal_sequence: module not found
2014-01-25 05:24:45,413 18276 WARNING HVLSnew openerp.modules.module: module sale_journal_sequence: module not found
2014-01-25 05:24:45,414 18276 WARNING HVLSnew openerp.modules.graph: module sale_journal_sequence: not installable, skipped
2014-01-25 05:24:45,417 18276 WARNING HVLSnew openerp.modules.graph: Some modules were not loaded.
2014-01-25 05:24:45,417 18276 INFO HVLSnew openerp.modules.loading: loading 77 modules...
2014-01-25 05:24:45,424 18276 WARNING HVLSnew openerp.modules.loading: The model edi.edi has no access rules, consider adding one. E.g. access_edi_edi,access_edi_edi,model_edi_edi,,1,1,1,1
2014-01-25 05:24:45,424 18276 WARNING HVLSnew openerp.modules.loading: The model base.action.rule.lead.test has no access rules, consider adding one. E.g. access_base_action_rule_lead_test,access_base_action_rule_lead_test,model_base_action_rule_lead_test,,1,1,1,1
2014-01-25 05:24:45,424 18276 WARNING HVLSnew openerp.modules.loading: The model account.invoice.type has no access rules, consider adding one. E.g. access_account_invoice_type,access_account_invoice_type,model_account_invoice_type,,1,1,1,1
2014-01-25 05:24:45,424 18276 WARNING HVLSnew openerp.modules.loading: The model account.tax.register has no access rules, consider adding one. E.g. access_account_tax_register,access_account_tax_register,model_account_tax_register,,1,1,1,1
2014-01-25 05:24:45,796 18276 WARNING HVLSnew openerp.modules.loading: Model crm.helpdesk is declared but cannot be loaded! (Perhaps a module was partially removed or renamed)
2014-01-25 05:24:45,796 18276 WARNING HVLSnew openerp.modules.loading: Model crm.helpdesk.report is declared but cannot be loaded! (Perhaps a module was partially removed or renamed)
you can check server log file. you can know about the actual error.