Debug a script in ASP.NET/VB.NET

Hi! I've a web url that points to /[login to view URL] which is pretty much an empty page that has an [login to view URL] script attached to it. The script is performing some regular import tasks, reads a folder, checks for filenames matching the database, performs what it needs to perform. Except it fails at some point. Gracefully of course, no errors, moves on, finishes the loop with no problems. I'm not very good at debugging this code. I do understand it though and I can point you directly to where it should go right but it goes wrong. Specifically it reads the last modification date of a file and if it's within the last 24 hours it should perform a database update which it obviously doesn't. I don't know how to var_dump aspx so here's where you come in. A tops 1h job really. I can give you remote desktop through TeamViewer to crack this. MS SQL as backend, everything else works fine. Just need to go through 10 lines of code to find where it skips. Tell me to #letschat and we shall do this in the next 24hrs. Thanks for bidding