Failure in attempt to attach files to Email message in Yahoo

Suddenly, I get a freeze up. Addresses enter, Can browse
for the file OK, but as soon as I click "attach file", it
freezes up, and I get error message listing line 190,
Error" Object doesn't support this method, Code 0. File
was only several lines. Yahoo says it isn't their code,
Zone Alarm said to cancel privacy setting, which I did but
the problem continues. Couldn't seem to locate anything
prevalent in Microsoft data base. Any suggestions
appreciated--this one has me stumped.