not ab;e to open or send attachments from yahoo mail

greetings!
– v r not able to open or send all types of attachments from yahoo mail. am able to save and open attachments in the standalone
– when v try to open an attachment it goes to another screen ..likewise when v try to send an attachemnt all attachements is shows attachment complete but actually a 0 byte filke is getting attached…

Pls help ..