Content Library Explorer error -error occurred while trying to read the package metadata (can't find package in console)

I have SCCM 2012 SP1 recently upgraded to R2. I'm currently setting this up to migrate my production 2007 site. However, I'm trying to use Content Library Explorer on my DP's. I have 3 dps. DP2 connects fine but when i try and connect to DP1 +3 i get the following error: An error occurred while trying to read the package metadata. The packagePackageID is invalid and must be redistributed from the Configuration Manger console.

Now i can't find any trace of this at all in the console. In the SMSPackagesHist table i can see the package ID and the deleted time was 29-07-2013. This most likely was me trying to create software updates back last year when i initially setup the site.

The package is not listed as content on any of the 3 DPs and i can't find any trace of it at all in the console.

I'm not very familiar with 2012, so not sure what I've done.

Any help or advice appreciated.

Thanks

Jane