Original title: iPhone 4s hotmail pc site

My iPhone 4s is jumping straight to my compose new mail page whenever I touch my inbox, junk box, and if I try to open a message and it only happens when I am in Pc site (hotmail) . It works okay on my laptop and my computer.  I have had my iPhone over 4 months and it always worked great in pc site hotmail until three days ago. Help! Regards Cat x