DDD can't accept keyboard inputs

[Brian Xue]

Hi,

I installed DDD 3.3.12 on my linux machine,

address@hidden ddd-3.3.12]$ uname -a
Linux localhost.localdomain 2.6.18-238.el5 #1 SMP Sun Dec 19 14:22:44 EST 2010 x86_64 x86_64 x86_64 GNU/Linux
address@hidden ddd-3.3.12]$ cat /etc/redhat-release
Red Hat Enterprise Linux Server release 5.6 (Tikanga)

it works well except that it can't accept any keyboard inputs, for example,

at tool bar, Program->Run to specify program arguments, Edit->Preferences->UndoBufferSize to specify undo buffer size.

BTW, gdb command input at the bottom of DDD window can be taken by DDD .

Cany anyone please help?

Thanks,
Brian