Yahoo! Mail Not Working Properly...

Hi all !

I have a peculiar problem with my Yahoo web-based email (someone @ yahoo.com) client. The incoming email opens as usual, but with no body text (i.e. the text pane is entirely blank). I cannot compose, reply or forward messages. Further, any change in general preference settings like composing messages as “plain text” cannot be saved by clicking on the ‘save’ button. Is it due any system generated errors in my PC or in the Yahoo server or rather due to any loophole between Yahoo mail’s All New and Classic versions? Or, is it the result of any hardware compatibility clashes? Please guide me as to how I can resolve this problem without further loss of time.