I was just checking to test if it is working or not, I did test it during when I was finding a solution to the trouble with Yahoo services on my Nokia phone's built-in IM and Email clients.
Visiting above URLs simply displays "Server Hangup" at my end. I then tried the same URLs on my Head Office's computer which is in UK, these URLs worked great without any trouble. Then I tried the same URLs on my Lahore Office's computer with internet from World Call, the links also worked good there as well. So it just tells me that Wateen's IPs are blocked by Yahoo and not letting them in Yahoo Mobile Services intentionally or unintentionally.
Using proxy to my office server also worked on Wateen's connection.
Can you please check aboveURLs on your end. And please mention the ISP you are using.