ASP.NET project calling a VB6 Ddll, error REGDB_E_READREGDB

I have a project in aspx with vb.net and this app calls a COM + DLL, and this DLL reads a registry key, in my VB6 app uses this DLL correctly, but adding this DLL's references on my .NET project, i get this error below:

Somebody help me with this error, pls...

Event code: 3005
Event message: An unhandled exception has occurred. 
Event time: 27/8/2014 11:25:13 
Event time (UTC): 27/8/2014 14:25:13 
Event ID: c94e2752e983457cb159dc7d9e5f75a1 
Event sequence: 7 
Event occurrence: 1 
Event detail code: 0 

Application information:

Application domain: /LM/W3SVC/1/Root/Constito-1-130536231061632161 
Trust level: Full 
Application Virtual Path: /Constito
Application Path: C:\Constito\ 
Machine name: SERVER-Constito

Process information:

Process ID: 7116 
Process name: w3wp.exe 
Account name: NT AUTHORITY\NETWORK SERVICE 

Exception information:

    Exception type: Exception 
    Exception message: 
      Unable to cast COM object of type 'System.__ComObject' to interface type 'U_Master.Obj'. 
      This operation failed because the QueryInterface 
     call on the COM component for the interface 
     with IID '{BE0634D8-325E-4A3E-9426-44D52F118BF9}' 
     failed due to the following error: 
     Could not read key from registry 
     (Exception from HRESULT: 0x80040150 (REGDB_E_READREGDB)).
   at Constito.Master.Post_DadosVB6(Object obj, String acao, String xmlArg, String p_cd_usuario) in C:\Constito\Master.vb:line 102
   at Constito.Principal.Page_Load(Object sender, EventArgs e) in C:\Constito\Principal.aspx.vb:line 30
   at System.Web.UI.Control.OnLoad(EventArgs e)
   at System.Web.UI.Control.LoadRecursive()
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean 
includeStagesAfterAsyncPoint)

Try setting the Application Pool user to an account with local admin privileges on the Web Server.

It looks like a registry permissions issue.

If thats not it ensure that the GUID (BE0634D8-325E-4A3E-9426-44D52F118BF9) exists in the HKEY_CLASSES_ROOT hive.