My mungelog says things like this:

Unable to build EntityDroideka--increase memory pool size in lua script

In the lua there are numbers in the memory pool section like this:

SetMemoryPoolSize("Aimer", 75)

Can i just increase them to a number i want or how can I increase memory pool sizes?

Yes. But I'm sure everything has a limit and crashes if you increase to much...
But for your droideka add this in the walker section:

AddWalkerType(0, 5)

Just for your information:

AddWalkerType([pairs of legs], [number of walkers])

[pairs of legs]
0 == special instance, only used for Droidekas
1 == for any two legged walker (one pair of legs)
2 == for the spider droid and AT-AT (two pairs of legs)
3 == AT-TE (only vehicle with three pairs of legs)

I don't know if 4, 5, 6, etc work. We've never had a vehicle with that many pairs of legs.

I have the walker lines and they aren´t my problem. the log says increase memory pool size...

Whats the exact error?

AddWalkerType(0, [number]) IS increasing the memory pool for Droidekas.