This board is for phpBB support not general programming issues. I didn’t see a board on your site so you will need to supply more information such as a url to your board or find a support site that deals with .net & php conversions.
convert .net to php gets a few hits on Google.
"The more connected we get the more alone we become" - Kyle Broflovski
There are no ‘threads’ in phpBB, they are topics.