Fallout mod manager wont start

[atlagame]

I Bought fallout new vegas recently and down load a bunch of mods and when I tried to start the game it kicked me out so after I checked to see what mods where conflicting the mod manager stoped working, can anyone help

 

 

 

Thursday, February 21, 2013 - 4:16:07 PM
Fomm 0.13.21
OS version: Microsoft Windows NT 6.2.9200.0

System.NullReferenceException: Object reference not set to an instance of an object.
at WebsiteAPIs.NexusAPI.get_LoginKey()
at Fomm.PackageManager.PackageManager.WebsiteLogin()
at Fomm.PackageManager.PackageManager..ctor(MainForm mf)
at Fomm.MainForm.bPackageManager_Click(Object sender, EventArgs e)
at System.Windows.Forms.Control.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ButtonBase.WndProc(Message& m)
at System.Windows.Forms.Button.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

 

 

 

 

[Gribbleshnibit8]

The Nexus login API changed with NMM. The way that FOMM checks for it is no longer valid and will cause the program to crash. You need to disable sign in. If you can't get FOMM to launch, the only way I know of (I'm sure I'm wrong, but it's the only way I know) to get it working again is to actually completely uninstall FOMM and install it again. Make sure you tell it to delete settings, but you should be able to keep install info around.

[atlagame]

Thanks it worked

[lquebecois]

ok i've fixed it, open a window and enter %appdata%. click on appdata and go into the local folder. erase the folder fomm.