My apologies for the snide post. We really don't approve of that sort of thing.
In reference to your problem, you have the Samsung Galaxy S2 from T-mobile, so I will move this post to that forum. It's best to get advice from people who have the same phone so that menus and options are the same.
There are a few ways to connect your phone to your PC. Out of the box, if you plug in the phone with no drivers installed on the PC you should see on the phone MTP mode. Depending on the version of windows you are using, you should see your phone show up under devices. You can copy files to and from the device. In order to sync and connect to kies you must have the proper drivers installed. Download and install kies
from Samsung's website. It will have the appropriate drivers and should install them properly the next time you plug in your phone.
You can also connect your phone as a mass storage device. For that you will go to settings>applications>USB utilities and select mass storage. Then, when you plug in your phone all user accessible areas will show up as a flash drive. You internal will be one drive and if you have a MicroSD card installed, that will be a second drive. You can copy files back and forth without special drivers. Many people prefer to mount their phones this way.
Finally there is debugging mode. This is for accessing the phone's file system for programming, troubleshooting and direct access through the android debug bridge. We don't really need to go into that. I just let you know in case you run across posts talking about it.
Media player should sync in either MTP mode or Mass storage, but the mass storage mode would be less troublesome.