Hi Dan,

I believe it has something to do with using UpdatePanel, but I didn't have time to investigate this problem father yet.

So far it looks like I can not set Enabled property in Server and Client side. However, I can trick it and set using ClientManager through JavaScript again, but it sounds a bit too complex...

Better understand exactly why it's not working.

>>Hi everybody,
>>
>>I have a button on my page that I set Enabled property to false in the Load event (I can also do it in ASPX directly).
>>
>>I also have a GridView with checkboxes. I added JavaScript code to enable the button once I click on the checkbox.
>>
>>In the server side code for the button I also try to disable it again using this.btnApprove.Enabled = false;
>>
>>I found two problems:
>>
>>1) I had a confirmation message for this button that doesn't appear anymore (in the ASPX OnClientClick).
>>
>>2) When I enable button in the Client side using disabled = true; I can no longer disable the button from the server-side code.
>>
>>Do you know what may be wrong? One important thing - I'm using UpdatePanel & UpdateProgress on this page. The button is not included into UpdatePanel (it triggers it).
>>
>>Thanks a lot in advance.
>
>Are there many checkboxes trying to influence a single button? or is it 1 checkbox/button?
>Try it without the "this."
>Just a guess but I have found the 'this' reference to be unreliable.