I love this extension, don't know how I lived without it the past 20 years!
In VS2013 I found it was built in but there are no keys assigned to it. The commands to map keys to are called Edit.MoveSelectedLinesUp and Edit.MoveSelectedLinesDown. They are on the Edit > Advanced menu if you want to try them.
PS. Don't use the Resharper version - it tries to keep the code syntactically correct and therefore totally sucks!
I installed power tools and that seems to have disabled moveline. The functjionality in power tools does not work in html, so i deinstalled it. But now even after deinstall and reinstall of moveline, i cannot get it to work.
Check to see which shortcut keys are assigned to the Tools.MoveLineUp and Tools.MoveLineDown commands: In the Visual Studio main menu go to Tools -> Options -> expand Environment -> select Keyboard. In the "Show commands containing" box type Tools.MoveLineUp or Tools.MoveLineDown. Assign the correct shortcut key if no shortcut is defined.
If the correct shortcut keys are already assigned, another command may be using the same shortcut keys and interfering with MoveLine. To check this, click in the "Press shortcut keys" box and press "Alt+Up Arrow". This should list all the commands that use that shortcut key. You can then remove the shortcut from those commands that are interfering. Do the same with the "Alt+Down Arrow" shortcut.
I hope this solves your issue.