That problem is quite common for certain versions of the game for some reason. There is no direct fix or bypas for it other then to cheat your way around the area but that way you'll never reach all 300 muds.
There is one thing that does work. Over on
gamecopyworld.com (legal site) you'll find .exe files for your Exoddus game. You can replace your original .exe file with that one and you'll have a different version of the game and all come with pro's and cons.
In the list you'll eventually find there are only two versions that work and those are the two German ones at the bottom which are noted as not fully functional. This is because those versions have a lot of bugs concerning the music and sounds in the game which will either loop all the time or not play at all. However those versions do fix the Aslik problem.
Do know that if you do this you'll have to start from the start, there's no way around that.
Lemme know if you need more help.