Internet Explorer 6 and script errors

Hi,
I’m running IE6 on Windows Nt 4.0, SP6a and there is a particular site that when we try to do a search on a zip code we receive the error: “..VBScript unexpected error (0x80040154)…”, and then it comes up with no results. I have tried uninstalling and reinstalling 6 but same problem. When I tried to go back to 5.5 and applied SP2 and all critical windows updates the same occurred.