Alien Breed 3D, stuck on level 8, Test Area Gamma

[HardStep]

Hi guys,
i've been playing AB3D for some nights again and got stuck on level 8, called Test Area Gamma. After i killed every single foe i was able to locate, i just walked around (had many tries:) and was unable to locate a yellow locked door or something, because i got the yellow key from the armory behind locked doors (red key). The K2 walker just stops and stands still. I've been wasting 2-3 hours on that level, but unable to get to exit nor get the blue exit key.
I can't recall how did i accomplish that level, when played AB3D back in nineties.
Any help is appreciated:)
Thanks.

[HardStep]

Thanks for the codes, but are there any other ways?
Will give a level 9 code a try if unable to get past that point.

[HardStep]

As it turned out, the problem was WHDLoaded Alien Breed. I was able to complete the level on floppy/hd version.
Gonna finish AB3D soon, fire it up every once in a while, now 2 levels to go :-)

[HardStep]

fryguy:
fire all your rockets and grenades at the walker, as usually:D

AmigaMance:
good idea.

[HardStep]

xeron wrote:
Out of interest, are you using PatchAB3D?

Yes, I'm using it, but have been unable to save the controls. Other preferences work as advertised, but saved controls are gone. Have deleted pref files and let it create new ones, but the result is the same.
Anyway, I'm satisfied with those other goodies your patch is offering. And HackAB3D is also a must.
I quess PatchAB3D doesn't support the 8channel abd.pk?