The Norwalk branch of Chase Manhattan bank warned customers Friday scammers are giving new meaning to the phrase ?gone fishing? by targeting credit card holders with fraudulent e-mail.Bank officials say the e-mails claim there is a problem with Chase Manhattan credit card customer accounts. The e-mails then ask for personal information to fix the account and even direct customers to a Web site, according to the bank. Computer experts say the technique is called ?phishing,? and involves mass mailings that try to extract information from anyone who bites.Internet security experts Jeff Helfand and Wendy Delson advise people never to reply to e-mails asking for personal information. Meanwhile, they say one way to spot a fake Web site is to look for lengthy, complicated Web addresses. They add any real Web site has a lockbox that flashes ?ssl? when the cursor hovers over the Web address. Finally, they say to pay attention to the beginning of the Web address, which should start with ?https.?Bank officials are advising those who have replied to one of these scams to contact their bank immediately.