Due to problems in the 2.50 release, the FH2 development team released FH2 version 2.51 yesterday.
The JDRGaming BF2 server is now running FH2 2.51. You'll need to run the FH2 2.51 client to play on the JDRGaming server.
The FH2 client launcher should automatically detect the new version and offer to download it.
As always, please let me know if you encounter any problems.