after execute test file d/l from git, wireless not ready, also cannot connect through Ethernet.

["inthawadee C." <nopasdee gmail com>]

Hello all,

After downloading  sources of the core NetworkManager daemon from git, I executed many test files for several times without any problems. The NM worked fine.
However, on the following day the NM-applet shows  "wireless not ready". All connections, both lan and wlan, cannot be established.

Did I do something wrong? 

The OS I used is Ubuntu 10.04.1 LTS.

Thanks for all answers.
Inthawadee C.