Can't start OpManager, License Dialog box appears

Can't start OpManager, License Dialog box appears

Hi
 
After a server crash I am now unable to start the OPmanager server. WHen I start it it launches a licensee Details dialog box and wants a license file. When I point it to our current license file (which was working fine...) it says the file is invalid and I get and error code 501.
 
I have tried to fix this by installing the latest service pack and hotfix but to no avail.
 
Any idea?
 
Thanks
 
Dave

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