CMG Content Location Request Issues

Hi

I have setup CMG in MECM 1910, I have aloud the CMG to act as a DP too, However when i try and run a task sequence from a machine off the network, It is not able to download any of the content even though the content is on the CMG.

I am seeing this in the SMSTS log - Content location request failed for PR10041B:116. (Code 0x80004005)

But i cannot see much online about the error code, Has anyone seen this ?

Thanks