Sure, did you put it in like this "STEAM_X:X:XXXXXXXX"
i know some people dont know that the STEAM has to be in there too. Let me know if this helped, oh and make sure there are no spaces before or after your steam id.
Before you are able to wear our tags you need to follow this link and apply to our community. There are instructions, so read the stickies, and then once you have posted there a member of the PSC will be able to help you out with this.