I have a consultant working on getting Authorize.NET working on my Debian woody machine, he is having a problem compiling software required by Authorize.NET. >Looks like an environment issue. Do you have a C compiler installed? >If not, you probably don't have the header files (usually located in >/usr/include). Verify that you have a C compiler, and the headers are >indeed in /usr/include. when I do a "dpkg -l gcc" I see the following. "ii gcc 2.95.4-14 The GNU C compiler." Ok, so the compiler is there... How would I verify that the headers are there? And if they are not there...how do I get them to /usr/include? Thanks, -Miles