Helkonstigt fel vid kompilering i ASP.NET (2.0)

Detta är helkonstigt, när jag försöker kompilera min ASP.NET 2.0 applikation så får jag följande fel:

Error	1	C:\WINDOWS\Microsoft.NET\Framework\v2.0.50215\Temporary ASP.NET Files\root\33da03dc\12710af4\u1r94jl9.3.vb(38): error BC30269: 'Protected ReadOnly Property Profile() As System.Web.Profile.DefaultProfile' has multiple definitions with identical signatures.		
Error	2	'Protected ReadOnly Property Profile() As System.Web.Profile.DefaultProfile' has multiple definitions with identical signatures.	C:\WINDOWS\Microsoft.NET\Framework\v2.0.50215\Temporary ASP.NET Files\root\33da03dc\12710af4\u1r94jl9.3.vb	38	
Error	3	'Protected ReadOnly Property ApplicationInstance() As ASP.Global_asax' has multiple definitions with identical signatures.		C:\WINDOWS\Microsoft.NET\Framework\v2.0.50215\Temporary ASP.NET Files\root\33da03dc\12710af4\u1r94jl9.3.vb	44	
Error	4	'Protected ReadOnly Property Profile() As System.Web.Profile.DefaultProfile' has multiple definitions with identical signatures.	C:\WINDOWS\Microsoft.NET\Framework\v2.0.50215\Temporary ASP.NET Files\root\33da03dc\12710af4\u1r94jl9.6.vb	38	
Error	5	'Protected ReadOnly Property ApplicationInstance() As ASP.Global_asax' has multiple definitions with identical signatures.		C:\WINDOWS\Microsoft.NET\Framework\v2.0.50215\Temporary ASP.NET Files\root\33da03dc\12710af4\u1r94jl9.6.vb	44

Jag antar att C:\WINDOWS\Microsoft.NET\Framework\v2.0.50215\Temporary ASP.NET Files\root\33da03dc\12710af4\u1r94jl9.3.vb är nån temporär fil, när jag går in och kollar så är det fel på följande rader:

Protected ReadOnly Property Profile() As System.Web.Profile.DefaultProfile

och

Protected ReadOnly Property ApplicationInstance() As ASP.Global_asax

Nån som har nån aning? :q