Cannot open same edrawings file on two different PCs

Hi,

I am wondering if somebody else had this problem before, I am thinking this could be an IIS issue, but it is worth a try. We have a webapp in our company where users can download 2D and 3D files from, the problem we are having is that if any user opens the file 123456.dwg, it opens correctly without any problem. The problem we have is that if any other user on any other PC tries to open this file while the first user has it open it will not open unless the first user closes it.

Thanks ofr your help

CS

SolidworksEdrawings