Internet Explorer automatic password dont work anymore

Hello, we've got a serious problem concerning Internet Explorer 9  on various pcs with Windows 7  Professional 64 bit edition .

For months we used to save username and passwords fields for a faster way of work , but now without having installed ANY

software nor hardware, Internet Explorer doesn't remind any username  / and or password .

We use Symantc Endpoint  Protection 12.1.4 here.

Maybe its symantec which cancels everytime the tracking cookies during the daily scans ?

I dont know how to solve the problem .

Help please !