Sessions and input form

Hi all, I have a form that when populated and submitted is entered into a MySQL dB. What I would like to do is be able to present the submitter with a confirmation page listing the information from the form and then ask them to confirm their submission. Also, if there is a problem or want to change something, they can use the browser back button to go to the previous page and make corrections. At first I thought that using Sessions to add the form values would allow this to work.. I have gone threw this twice since last night and find that my logic is flawed... It works once... then when another submissions is attempted the process hangs and returns a CGI timeout. I am by no means a newbie but obviously I am not doing something right with regards to session use. So I ask you more knowledgeable then I for your input and advise. In hind sight I think my problem is that once the information is confirmed and supposed to be entered into the dB I am not destroying the session... Like I said, I think my approach is all wrong here. I already have a login routine that uses sessions and works flawlessly..[at least in appearance]. Any help would be very much appreciated. TYIA Aleks