mono&monodevelop problem

[~rob33n]

firstly I search the forum and cant find any answer or I cant see. sorry.
I installed mono but I cant install monodevelop.
I added the source

deb Index of / ./

and when I update the source (apt-get update) I get this error. anyway and I choose monodevelop on synapstic or trying on terminal (apt-get install monodevelop) and than it says monodevelop depends ... and dont install it. I am going to crazy. I couldnt fix this problem.
is there any source for monodevelop?

error is:

W: GPG error: http://debian.meebey.net ./ Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 7127E5ABEEF946C8

and I got this error when I trying to install monodevelop:

Reading package lists... Done
Building dependency tree... Done
monodevelop is already the newest version.
You might want to run `apt-get -f install' to correct these:
The following packages have unmet dependencies:
  monodevelop: Depends: libgconf2.0-cil (>= 2.16.0) but 2.8.3-2 is to be installed
               Depends: libgecko2.0-cil (>= 0.11-3) but it is not going to be installed
               Depends: libglade2.0-cil (>= 2.10.0) but 2.8.3-2 is to be installed
               Depends: libglib2.0-0 (>= 2.12.9) but 2.12.4-2 is to be installed
               Depends: libglib2.0-cil (>= 2.10.0) but 2.8.3-2 is to be installed
               Depends: libgnome-vfs2.0-cil (>= 2.16.0) but it is not installable
               Depends: libgnome2.0-cil (>= 2.16.0) but 2.8.3-2 is to be installed
               Depends: libgtk2.0-cil (>= 2.10.0) but 2.8.3-2 is to be installed
               Depends: libgtkhtml2.0-cil (>= 2.16.0) but it is not installable
               Depends: libgtksourceview2.0-cil (>= 0.10) but it is not going to be installed
               Depends: libgtksourceview2.0-cil (< 0.11) but it is not going to be installed
               Depends: liblog4net1.2-cil (>= 1.2.8) but it is not going to be installed
               Depends: liblog4net1.2-cil (< 1.2.10) but it is not going to be installed
               Depends: libmono-addins-gui0.2-cil (>= 0.2) but it is not installable
               Depends: libmono-addins0.2-cil (>= 0.2) but it is not installable
               Depends: libmono-cairo2.0-cil (>= 1.0) but it is not going to be installed
               Depends: libmono-cecil0.5-cil (>= 0.5) but it is not installable
               Depends: libmono-corlib2.0-cil (>= 1.2.4) but 1.2.2.1-1etch1 is to be installed
               Depends: libmono-system-runtime2.0-cil (>= 1.0) but it is not going to be installed
               Depends: libmono-system2.0-cil (>= 1.2.4) but 1.2.2.1-1etch1 is to be installed
               Depends: libmono-winforms2.0-cil (>= 1.2.4) but 1.2.2.1-1etch1 is to be installed
               Depends: libmono1.0-cil (>= 1.2.4) but 1.2.2.1-1etch1 is to be installed
               Depends: libmono2.0-cil (>= 1.2.4) but 1.2.2.1-1etch1 is to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).

[~rob33n]

does anyone have an idea?