My nokia 3600 phone's messages. :(

Hello,
i have a problem with my nokia 3600 .. whenever somebody's sending me a message its like this. take a look! :(
original text message from my friend:
hi issa!

how are you?

and this is what i receive..
hi issa!
how are you?

i mean, there's no space or enter thingy whatever you call that. please help me. desperate to know the answer to my phone problem.. or is this permanent or something? you see my friend also, she has her nokia supernova 7200, not the slide one. please! i dont wanna lose hope.
thanks! ill be waiting for the replies. ASAP! :D

sincerely yours,
Issa