User Id gets locked while using time sheet

Hi,

I have web enabled the the transaction (cat2)to enter timesheet and am displaying it in SAP Portal.

The problem is that when a user clicks on a link "Time sheet", this click in turn calls the transaction cat2 through ITS.Now while the page from ITS gets loaded, if it takes 10 seconds to load this page and the user clicks on the Time sheet link twice, the personal number which which the user ID is linked to gets locked in R/3.

Now I have to manually go to sm12 in R/3 to release the lock.

This is causing a lot of problems for our users to fill in their time sheet.

Any ideas, any help.

Thanks in advance.

Vivek