New themes not showing up! :(

[solidskatr]

Hey guys LOVIN this site!! Its been a TON of help in customizing my mogul!!.... but I need ur help.... i just recently purchased the mogul and am trying to install some new themes... but when I download them onto my phone and attempt to open the file and use it as my main theme... it just takes me to the today screen with the default themes.... nothing new shows up! the themes show up as .tsk files but when I open them nothin new shows up under the today screen theme settings! ... Am I missing something???...is there another step??.... please help!