Error when "modify privileges"

[hehachris]

A segmentation fault has occurred

above error occurs when i click "modify privileges" of a database user.

i m using a separated MySQL Server.
how can i fix the error??

[jmstacey]

What operating system are you running? Version of DirectAdmin? Version of MySQL?
What setup are you using for the remote MySQL server?
Do any other mysql management functions work?