Spotlight Cam Pro Plug-in goes off-line

Twice it has happened and I had to pull the power plug to reset it. It is not my network nor my power outlet. Why? Because I have both of these models plugged in same room and same power strip. Each one goes out 2 windows pointing at different sides of the house walls. (It's a corner room). So if one is fine, why does the other keep having this problem? Anyone else get this product showing off-line resulting in a power pull of the plug?This is a problem if I'm not home.Thanks