I'm new to using the SVN system and having hard time figuring out how to delete files uploaded mistakenly.

What I've done:

1. Committed the trunk folder with right clicking on "SVN Commit"
2. Right clicked and choose "TortoiseSVN" -> "Branch/Tag"
3. In the section of "To path:" in the "Branch/Tag - Tortoise" window, I typed /*mydirectory*/tags/*1.0.11* where 1.0.11 was supposed to be 1.0.1.1
4. After realizing 1.0.11 was a mistake, to remove the directory, I right clicked on the 1.0.11 folder in Windows and selected "TortoiseSVN" -> "Delete"

It deleted the folder in Windows but does not delete the folder in the remote server.

According to this page,http://stackoverflow.com/questions/2092344/how-do-i-delete-a-wrongly-tagged-directory-in-svn, a command can be used and I tried to type svn in the command prompt window but it gives svn is not recognized as an internal or external command.

This should be a very basic question but I could not find relevant pages. Some pages suggest to use revert but I've already committed 1.0.1.1 so I'm afraid doing revert causes the newest one to be deleted.

Thanks for your information.