FAXCOMLIB- cannot fax .pdf files

Question

I have a console application that uses Faxcomlib and can fax .pdf files. When I created an ASP.NET application to do the same thing, it times out without faxing the .pdf file. It can fax .jpg and .tiff files with no problem. But, the resolution in these formats for the same image is not as clear as .pdf. Has anyone else had this problem and what is the solution?