Approve Leads

Hi , i have imported some leads from Excel. The process ended with no problems, now i am trying to approve the leads in order to transfer them into the lead section but there is a page error. This is page i am working on http://crm.zoho.com/crm/WebLeadApproval.do the error is the following

row : 1644
character 25
Error - Expected ")"
code 0

Please help