Wepkey2 not working


I used to work with DIGI WI-SP modems, but today i found something strange with one of’em.

When the modem is set up to use wepkey1 it is working well, but when i entered a second wepkey, and set wepindex to 2 the modem seems to connect to the wifi network but can’t ping the server.
It seems like the wifi part of the settings worked but the IP don’t.

Is this a known problem ? How to resolve this ?

these are the firmware versions

Firmware Version : 2.8.2 (Version 82001220_K1 10/28/2008)
Boot Version : 1.1.3 (release_82001187_C)
Post Version : 1.1.3 (release_82001188_E)

thanks by advance

I have a similar problem too…