ATI Radeon HD3450 on FreeBSD 7.2

[Ricky Tompu Breaky]

Dear my friends,

I just installed FreeBSD 7.2. But its xserver always hung-up (suddenly
stop working), only the GUI which suddenly stops working once I execute:
"
startx
".
I can see the GUI but I can not do anything on it. I can not click
anything and I can not type nothing on it.

My computer use ATI Radeon HD3450.

But the kernel still works as the xserver stops working because if I do
"CTRL-Alt-F1/F2/F3/F?" then I can see the login prompt console.

What should I do to solve this problem?

Thank you very much in advance.