Piano tune ID from the 1990's whistled melody

https://soundcloud.com/user230106123/thursday-08-41-pm

Hi can anyone ID this tune from around the latter part of the nineties (I think). Sorry for the quality of the whistling but it's the only thing I've got to go off from a memory that's about 15 years old...

The melody is piano with quite a steady slow bpm I can't remember if there are any female vocals or not.

Anybody think any tune sounds like the melody, any help appreciated, thanks.

Here's an update, My friend has managed to put the melody onto a piano app, have a listen & see if you recognize it. Hopefully someone will...

http://soundcloud.com/snoozy/my-song-4