Table valued function only returns CLR error

I have read-only access to a database that was set up for a third-party, closed-source app. Once group of (hopefully) useful table functions only returns the error:

Failed to initialize the Common Language Runtime (CLR) v2.0.50727 with HRESULT 0x80131522. You need to restart SQL server to use CLR integration features. (severity 16)

But in theory, the third-party app should be able to use the function (either directly or indirectly), so I'm convinced I'm not setting things up right.

I'm very new to SQL Server, so I could be missing something obvious. Or I could be missing something really slight, I have no idea.

Here is an example of a query that returns the above error:

SELECT * FROM 
dbo.UncompressDataDateRange(4,'Apr 24 2010 12:00AM','Apr 30 2010 12:00AM')

Where the function takes three parameters:

1. The Data Set (int) -- basically the data has 6 classifications, and the giant table this should be pulling from has a column to indicate which is which.

2. startDate (smalldatetime)

3. endDate (smalldatetime)

There are other, similar functions that expand on the same idea, all returning the same error.

Quick Note:

I'm not sure if this is relevant, but I was able to connect to the database via SQL Studio (but without the privs to script the functions as code), and a checked the dependency for the above sample function. It turns out that it is a dependent of a view that I have gotten to work, and that view is dependent of the larger, much-hairier data-table.

This makes me think I should somehow be pointing the function at the results of the view, but I'm not seeing any documentation that shows how that is done.

The error message appears to hint that:

You need to restart SQL server to use CLR integration features

Perhaps the 3rd party installer enabled CLR integration, but was not able to restart SQL Server.