Something as simple as saying what ver. of cmsms it is, theme you tried, how you imported it, what post you were referring to for solutions, would go a long way in helping us reproduce the problem, as this is what we do if it isn't something that has come up before or isn't just a simple fix...
Just from your post I have to wonder where/how you imported it, the folder you refer to, templates_c, is for when the page get called/rendered the system put some information in this folder as a kind of cache so it doesn't have to go to the DB to pull all information every time a page is called...
Just in case you don't know, to import a theme, in the XML format, you go to Layout » Theme Manager and the Import tab then browse your comp. for the XML file then hit the Import button under the browse window, then to Layout » Templates to set it as active, all of this is explained here...
http://themes.cmsmadesimple.org/Download_Themes.html
Sorry for the misunderstanding but it is sometimes hard to help if the problem is not well researched and presented with out enough information to really help, and this happens alot...
A lot of the questions we get can be answered by reading the default content/pages that come with the install...