Altiris 7.1 - PC's boot to WinPE but tasks fail while in WinPE

We have just set up a Altiris 7.1 environment for our company, the begining of last week we had all our 2 sites set up and imaging was working perfectly fine.  We ran a batch of 15 computers imaged just fine.  Today at both our NS server site and our Site Server site PC's will boot to WinPE and the last line says "startup completed" but from there all tasks fail to run. 

We have restarted all 4 of the PXE services at both our site and NS servers.

We can ping the servers from the PC's

Here is what we get in the console

Any ideas?

Thanks,

Jim