[Pkg-mono-devel] Server Error when installing mono project

[Andrew Collier]

To Whom it May Concern,
    I have attempted to install Mono Project on my Debian system (7.5) it is running the latest versionsof Apache, Perl, PHP and the following erroroccurs.



andrew at server:/etc/apt$ sudo apt-get install mono-complete
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 mono-complete : Depends: mono-runtime (= 2.10.8.1-8) but it is not going to be installed
                 Depends: mono-runtime-sgen (= 2.10.8.1-8) but it is not going to be installed
                 Depends: mono-utils (= 2.10.8.1-8) but it is not going to be installed
                 Depends: mono-devel (= 2.10.8.1-8) but it is not going to be installed
                 Depends: mono-mcs (= 2.10.8.1-8) but it is not going to be installed
                 Depends: mono-gmcs (= 2.10.8.1-8) but it is not going to be installed
                 Depends: mono-dmcs (= 2.10.8.1-8) but it is not going to be installed
                 Depends: mono-csharp-shell (= 2.10.8.1-8) but it is not going to be installed
                 Depends: mono-2.0-gac (= 2.10.8.1-8) but it is not going to be installed
                 Depends: mono-4.0-gac (= 2.10.8.1-8) but it is not going to be installed
                 Depends: mono-2.0-service (= 2.10.8.1-8) but it is not going to be installed
                 Depends: mono-4.0-service (= 2.10.8.1-8) but it is not going to be installed
                 Depends: monodoc-base (= 2.10.8.1-8) but it is not going to be installed
                 Depends: monodoc-manual (= 2.10.8.1-8) but it is not going to be installed
                 Depends: libmono-cil-dev (= 2.10.8.1-8) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
andrew at server:/etc/apt$


are you able to give me any ideas why?
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