TInvalidOperationException

0032:                 $this->ShowGraduationSilo->Visible="true";
0033:                 $this->ShowPremiumCards->Visible="false";
0034:                 $this->ShowPremiumCards->Display=None;
0035:                 $PremiumHide ="Yes";
0036: 
0037:             }else if($UniqueMainCategoryName=="halloween-invitations" || $UniqueMainCategoryName=="christmas")
0038:             {
0039:                 $this->GridActivePanel->Visible="false";
0040:                 $this->ShowGraduationSilo->Visible="false";
0041:                 $this->ShowPremiumCards->Visible="false";
0042:                 $this->ShowPremiumCards->Display=None;
0043:                 $this->HidePagePanel->Visible="false";
0044:                 $PremiumHide ="Yes";
0045:             }
0046:             else{
0047:                 $this->GridActivePanel->Visible="true";
0048:             }
0049:         }
0050:         else
0051:         $this->CategoryId = $this->Request["CategoryID"];
0052:         
0053:         $searchtermarray = array();
0054:         $searchtermarray['cid'] = $this->CategoryId;
0055:         $this->Grid->VirtualItemCount=$this->getCount($searchtermarray);

#0 /home/invitationshop/framework/Web/UI/TControl.php(204): TComponent->__get('HidePagePanel')
#1 /home/invitationshop/public_html/protected/pages/ProductList.php(43): TControl->__get('HidePagePanel')
#2 /home/invitationshop/framework/Web/UI/TControl.php(1286): ProductList->onLoad(NULL)
#3 /home/invitationshop/framework/Web/UI/TPage.php(215): TControl->loadRecursive()
#4 /home/invitationshop/framework/Web/UI/TPage.php(198): TPage->processNormalRequest(Object(THtmlWriter))
#5 /home/invitationshop/framework/Web/Services/TPageService.php(498): TPage->run(Object(THtmlWriter))
#6 /home/invitationshop/framework/Web/Services/TPageService.php(444): TPageService->runPage(Object(ProductList), Array)
#7 /home/invitationshop/framework/TApplication.php(1095): TPageService->run()
#8 /home/invitationshop/framework/TApplication.php(382): TApplication->runService()
#9 /home/invitationshop/public_html/index.php(19): TApplication->run()
#10 {main}