How to enable back button in Internet Explorer

[Videla]

Hi All,
I am using ASP.NET 2.0 to build my web pages. In my web page I am displaying a Crystal report to the users using Crystal report viewer control.

Let me give you an example what i am trying to achieve here.

My Home web page will have a list of drop downs and users has to choose their options then they will click "SUBMIT" button to get the report in a new window.
My report has drilldown like
Planet --> Level1
Country --> Level2
State --> Level3
City --> Level4
For drill downs I am using the hyperlink property of text object which is available in Crystal report. On clicking the link, the same page will be refreshed to second level of the report and this goes on till last level. My problem is: User should have the option to go back to previous level just by clicking the back button available in Internet Explorer. Currently in my web page, I am abale to go to previous 1 level only.
For example:
If I am in level 3, I should be able to goto Level 1 but now I am able to go to level 2 only.
After reaching previous 1 level, the back button is disabled automatically.
Please help me in enabling the back button.

Other Details
Crystal report Ver XI
ASP.NET 2.0
Code Behind: VB.NET

Here is my code in Page load
if not page.ispostback then
Dim mySessionMgr As SessionMgr = New SessionMgr
Dim myEnterpriseSession As EnterpriseSession = mySessionMgr.Logon(uname, pwd, servername, "secEnterprise")
Dim myEnterpriseService As EnterpriseService = myEnterpriseSession.GetService("InfoStore")
Dim myInfoStore As InfoStore = New InfoStore(myEnterpriseService)
myEnterpriseService = myEnterpriseSession.GetService("PSReportFactory")
Dim psrfObject As Object = myEnterpriseService.Interface
Dim myPSReportFactory As PSReportFactory = CType(psrfObject, PSReportFactory)
Dim queryString As String = "Select SI_ID, SI_NAME, SI_PARENTID From CI_INFOOBJECTS " _
& "Where SI_KIND='CrystalReport' and SI_INSTANCE=0 " _
& "And SI_NAME = 'Product_Mix_BD'"
Dim myInfoObjects As InfoObjects = myInfoStore.Query(queryString)
Dim myInfoObject As InfoObject = myInfoObjects(1)
Dim myReportSource As ReportSource = myPSReportFactory.OpenReportSource(myInfoObject.ID)

' Binding parameters to Crystal report Viewer
'cv_ezinfo is my Crystal report Viewer

cv_ezinfo.EnableDatabaseLogonPrompt = False
cv_ezinfo.DisplayBottomToolbar = True
cv_ezinfo.DisplayToolbar = True
cv_ezinfo.DisplayGroupTree = False
cv_ezinfo.HasCrystalLogo = False
cv_ezinfo.HasToggleGroupTreeButton = False
Session("my_rptsrc") = myReportSource
cv_ezinfo.ReportSource = myReportSource
temp = DateTime.Now
else
cv_ezinfo.EnableDatabaseLogonPrompt = False
cv_ezinfo.DisplayBottomToolbar = True
cv_ezinfo.DisplayToolbar = True
cv_ezinfo.DisplayGroupTree = False
cv_ezinfo.HasCrystalLogo = False
cv_ezinfo.HasToggleGroupTreeButton = False
cv_ezinfo.ReportSource = CType(Session("my_rptsrc"), ReportSource)
End If

 

[Isadore]

Videla: From my experience the Crystal Reports experts don't seem to hand around for long periods here at the ASP.NET forum; as I see from time to time a Crystal Report disappearing - however, some are answered and quite technically so this is a good place to start.

You might want to search out the Crystal Report groups here at Tek-Tips and repost on one of those threads - you might get a faster response.

Post back and let me know what you find - I haven't visited these sites myself but have been told they are here and quite good.

 

[Videla]

Thanks Isadore,
Let me post this Crystal groups here