Help please converting SGZ from ASX to AIM

Hi fellow SGZ holders,

I'm after some help please from some of you knowledgeable peeps.
I currently do my trading through NABTRADE so they hold my HIN, but in contacting them they say that they cannot convert these shares from ASX to AIM as they don't do that, so I then rang a local broker as well as Computershare and they both told me that only NABTRADE can convert these as they hold my HIN but another call to NABTRADE resulted in the same answer of they cannot convert them ... hmmmmm, so I'm a little confused now as to why NABTRADE cannot convert my SGZ shares and I'm not sure what to do now, any help would be much appreciated as I want to be able to get them on the AIM so I can trade them there, thanks heaps