Att Yahoo mail won't forward

by luhale - 4/17/10 12:21 PM

My PC is a Compaq Presario SR1020NX, Windows XP. My DSL internet is ATT YAHOO. But I am still using my sbcglobal mail address.They said I could.
I Had a Realtek RTL8139x Family fast Ethernet NIC installed when I bought it. Lightening hit the Realtek and I replaced it with Linkjsys LNE100X Fast Ethernet. I did not know how to change out the Realtek, so I put the Linksys in an extra slot. My PC is fast on line with everything ,but ATT Yahoo. I can not forward any mail , or send mail.It also opens pages in my email very slow. I have searched everywhere. Please help.