blue eyes why you dont msn ?

my try .  mavi gozz neden sen msn`de?

Mavi göz, neden MSN´de deðilsin? - why you don´t on MSN?

Mavi göz, neden MSN kullanmýyorsun? - why you don´t use MSN?

There is no verb in the sentence.

 "dont  ~ do not~" is  a verb but the word order in the request is unusual,  

The expected phrase would be "why don´t you MSN"  Saying "why you don´t MSN" suggests that it is a clause where there some other following conclusion.   "why you don´t MSN .... is     Blah Blah"

Yes, ´do not´ is auxiliary verb but there should be more, such as ´use´. Or MSN have already become a verb like google?

thank you all.