Problem using rules to append word from memory

Hello!

I'm trying to run a simple rule, like defined on the rules page, to append the word uppercased (passPASS), using "uMl4".
I've ran a oclHashcat straight attack with a common english wordlist and this rule, but for some reason, i think it's not working, because it cracks no hashes... 

If i run a combinator attack with the same wordlist, plus "u" rule on the right wordlist, it cracks the hashes.
But since i just want to append the same word, the combinator waste a lot of time matching all the different words.

I've tried to debug, using hashcat-cli64.exe, with the --stdout option, and it seems ok. But running it the against the hashes it cracks nothing, just like oclHashcat64.

I also tried to run a very simple test using the files i'm attaching. It only cracks 1 of the 2 hashes.
The hashes are the md5 for genericgeneric and genericGENERIC, and the rules are d, uMl4 and lMu6.

Am i doing something wrong?
Thanks!

  testrule.txt (Size: 30 bytes / Downloads: 2)

  testhashes.txt (Size: 66 bytes / Downloads: 3)