Using 'indirect' function with full network path
 

I am running Excel 2007. I have a cell (C$110) that contains a path that is used in an 'indirect' function. Currently cell C110 has F:\path to file\.. I would like to change this to \\server\share\path to file\ because someone else that accesses this file has a different map drive letter. They use W instead of F. When I change the path to \\server\share\file\, the indirect formula gives a 'REF#' error. How can I fix this so it works for both of us?

TIA