Windows Phone 7 foursqaure application error

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Windows

DLL

phone

Microsoft

Actually I'm running the foursquare Windows Phone 7 application in 4square.codeplex.com.. It was developed in the first version of WP7 tools before its latest update..

So I migrated the assemblies and everything and now I have no compilation errors.. I still have a problem in running the application.. I can send you the application if needed because it's developers in codeplex didn't migrate it yet so we can collborate on that.
Here is the log :

'taskhost.exe' (Managed): Loaded 'C:\Program Files (x86)\Microsoft.NET\SDK\CompactFramework\v2.0\WindowsCE\mscorlib.dll'
'taskhost.exe' (Managed): Loaded 'System.Windows.RuntimeHost.dll'
'taskhost.exe' (Managed): Loaded 'System.dll'
'taskhost.exe' (Managed): Loaded 'System.Windows.dll'
'taskhost.exe' (Managed): Loaded 'System.Core.dll'
'taskhost.exe' (Managed): Loaded 'System.Xml.dll'
'taskhost.exe' (Managed): Loaded '\Applications\Install\1C057CA1-7BBE-4720-8584-8E9FB1DF7520\Install\Foursquare.dll', Symbols loaded.
'taskhost.exe' (Managed): Loaded 'Microsoft.Phone.dll'
'taskhost.exe' (Managed): Loaded 'Microsoft.Phone.Interop.dll'
'taskhost.exe' (Managed): Loaded '\Applications\Install\1C057CA1-7BBE-4720-8584-8E9FB1DF7520\Install\System.Windows.Controls.Layout.Toolkit.dll'
'taskhost.exe' (Managed): Loaded '\Applications\Install\1C057CA1-7BBE-4720-8584-8E9FB1DF7520\Install\System.Windows.Controls.Toolkit.dll'
A first chance exception of type 'System.InvalidOperationException' occurred in Microsoft.Phone.dll
A first chance exception of type 'System.InvalidOperationException' occurred in Microsoft.Phone.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in mscorlib.dll
The program '[215875638] taskhost.exe: Managed' has exited with code 0 (0x0).

Thanks!