IE6 problem with yahoo

[nnmmss72]

i have IE 6 which i cann' type anything when i am in yahoo mail, the IE gives me different errors of javascript and sometimes not,but the cursor doesn't appear in text box so i am not able to write anything in compse or reply section. this happens just in yahoo mail and as you can see i have typed in tek-tips.

any idea to fix it

 

[nnmmss72]

i changed the yahoo mail setting from HTML to plain text. so it worked, i could type in textbox, but again when i changed to HTML so the cursor could not be appeared in textbox of body section of email.