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sfdev1sfdev1 

Problems installing packages on Sandbox

I'm currently having problems installing a package on the sandbox

 

I get the following error 

 

Your login attempt has failed. The username or password may be incorrect, or your location or login time may be restricted. Please contact the administrator at your company for help. 

 

The install works fine it I install it on the production server but I always have problems when I try loading it with the sandbox version. Should I be changing the url in someway? 

 

Package Description : Concerting form to pdf using Visual Force 

https://login.salesforce.com/?startURL=/packaging/installPackage.apexp%3Fp0%3D04t300000008UDT 

lvivaninlvivanin

https://test.salesforce.com/?startURL=/packaging/installPackage.apexp%3Fp0%3D04t300000008UDT