Access Denied Error While Activating Custom SiteCollection Feature

Hi ,

I am getting Access Denied Error While Activating Custom SiteCollection Feature ,

I am SiteCollection Adminsitrator and Farm Adminstrator when i Check in the Uls Logs i am getting below stack trace,

I am able to activate Out of the box features and I have checked AppPool Account permissions for the Webapp its having full control permissions to the content db.

In our Feature receiver we have a code to change the master page , apart from that no other business logic is inside feature reciever.  I am able to activate the feature through Powershell but which will not solve my problem as siteOwners as can't have access to Powershell.

Kindly help me how to proceed with this.

System.UnauthorizedAccessException: Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED)), StackTrace:   
 at Microsoft.SharePoint.SPWeb.InitWeb()    
 at Microsoft.SharePoint.SPWeb.get_Title()    
 at Microsoft.SharePoint.SPSite.OpenWeb(Guid gWebId, Int32 mondoHint)    
 at Microsoft.SharePoint.Utilities.SPUtility.<>c__DisplayClass9.<FindObjectAccessed>b__8()    
 at Microsoft.SharePoint.SPSecurity.<>c__DisplayClass5.<RunWithElevatedPrivileges>b__3()    
 at Microsoft.SharePoint.Utilities.SecurityContext.RunAsProcess(CodeToRunElevated secureCode)    
 at Microsoft.SharePoint.SPSecurity.RunWithElevatedPrivileges(WaitCallback secureCode, Object param)    
 at Microsoft.SharePoint.SPSecurity.RunWithElevatedPrivileges(CodeToRunElevated secureCode)    
 at Microsoft.SharePoint.Utilities.SPUtility.FindObjectAccessed(SPWeb web, SPSite site, SPObjectType& objType, String& strObject, String& strListItemId)    
 at Microsoft.SharePoint.Utilities.SPUtility.RedirectToAccessDeniedPage(HttpContext context)    
 at Microsoft.SharePoint.Utilities.SPUtility.HandleAccessDenied(HttpContext context)    
 at Microsoft.SharePoint.ApplicationRuntime.SPRequestModule.PreSendRequestHeaders(Object oSender, EventArgs ea)    
 at Microsoft.SharePoint.ApplicationRuntime.SPRequestModule.EndRequestHandler(Object oSender, EventArgs ea)    
 at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()    
 at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)    
 at System.Web.HttpApplication.PipelineStepManager.ResumeSteps(Exception error)    
 at System.Web.HttpApplication.BeginProcessRequestNotification(HttpContext context, AsyncCallback cb)    
 at System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context)    
 at System.Web.Hosting.PipelineRuntime.ProcessRequestNotificationHelper(IntPtr rootedObjectsPointer, IntPtr nativeRequestContext, IntPtr moduleData, Int32 flags)    
 at System.Web.Hosting.PipelineRuntime.ProcessRequestNotification(IntPtr rootedObjectsPointer, IntPtr nativeRequestContext, IntPtr moduleData, Int32 flags)    
 at System.Web.Hosting.UnsafeIISMethods.MgdIndicateCompletion(IntPtr pHandler, RequestNotificationStatus& notificationStatus)    
 at System.Web.Hosting.UnsafeIISMethods.MgdIndicateCompletion(IntPtr pHandler, RequestNotificationStatus& notificationStatus)    
 at System.Web.Hosting.PipelineRuntime.ProcessRequestNotificationHelper(IntPtr rootedObjectsPointer, IntPtr nativeRequestContext, IntPtr moduleData, Int32 flags)    
 at System.Web.Hosting.PipelineRuntime.ProcessRequestNotification(IntPtr rootedObjectsPointer, IntPtr nativeRequestContext, IntPtr moduleData, Int32 flags)

Thanks,

Manjunath