Errors like that are often caused by a mismatch of the binaries in your /bin folder.
I would start your investigations by running the Jade version info utility (jverinfo.exe) in your /bin directory. This will create a versioninfo.txt file listing the versions of the dlls/exes/etc in your bin folder.
You can then review the details in the versioninfo.txt file to see if there is any obvious mismatch in the binaries that could explain this behaviour.
Alternately, if you have a valid support contract, you could try asking the Jade Support team for some assistance in resolving this issue.
Cheers,
BeeJay.