[Serusers] serweb configuration on alternate port

Hi, I installed ser along with mysql and serweb. I'm able to login in admin mode using serweb. I tried to create new users using the subscribe button, the process goes smootly, and I do get an email asking me to confirm. When I do click on the onfirmation link, the browser tries to access the confirmation page, but I never see it, and I never see any error (page not found..) it just goes balnk forever. In fact I can never see any link generated by php and sent via email (password retrieval, account confirmation). I'm running http on port 5001, but I'm taking care of adding the port when accessing the pages, but to no effect. Is anyone using serweb, is there something I should pay attention to if changing the default port number of apache ? Thanks. Samy.