Initializing LithiumSSOClient throws "type initializer" exception

Hello,

I'm attempting to move the login, register, and forgot password pages between two IIS sites. I moved the code itself (which I didn't change at all), the SSO key, the 11 Lithium values in the web.config, and the LithiumSSOClient.dll file. 

However when attempting to excute anything that interacts with SSO, I get the following error:

[SSOException: Lithium Encryption Key not initialized.System.Exception- error reading stream: The type initializer for 'LithiumSSOClient.KeyManager' threw an exception., stack trace: at LithiumSSOClient.KeyManager.readKey(String file)
at LithiumSSOClient.SSOClient.initKey()]
LithiumSSOClient.SSOClient.initKey() +544

The line of code looks like so:

LithiumSSOClient.SSOClient.init(pathtoLithiumSSOKey, pathtoLithiumSSOUniqueID, pathtoLithiumSSODomain);

I also confirmed that the permissions set on the key file are standard. I know that it's at least seeing the key as deleting it gives me another error. Any ideas? We've been stuck on this issue for a few weeks now. Thank you!