Question about inserting custom sounds in maps PLEASE HELP

Ok guys I know this should be posted in the sound forum, but in the Sound Forum there are nearly no answers. So i watned to post this here. Please leave it a little bit so I can get some answers ok?? Ok my friend made some custom sounds for the marines because there aren't any. But there is the problem we cannot get them to work in the game. (I mean that you click on the unit and then it replys our custom sounds). We tried to replace the WATERELEMENTAL sound. We made new sound files which had exactly the same names as the Waterelemental. So for example: Waterelementalyes2 and like that. Then i used WINMPQ to insert them into the map and changed the sounds of the marines so they should be using the waterelemental sounds. Strangly the game plays nothing when I click on the units. This would mean that the game rcogniesees that I have new units but he does not see what he has to play. Please provide any support possible it's really important to me and my friend

Thx in advance: OUGUIYA

make sure that implanting sound is the last thing you do.

Also, check the path and filename to make sure they're exactly correct when you implant the file - wc3 in general is unforgiving of capitalization mistakes.