People, I am going crazy already

I have a page default.aspx where i am using Page Methods. Evetrything works
fine.
Now i want to create second page default2.aspx. in the same project/same
folder.
It gives me a JavaScript error PageMethods not defined.

I copied (CNTRL+A, CNTRL+C, CNTRL+A, CNTRL+V) everything from default1.aspx
into default2.aspx (no code behind).

Still not working. When i look at the source in HTML of default.aspx, line
<asp:ScriptManager ID="ScriptManager1" runat="server" EnablePageMethods=true
/>

generates PageMethods declaration in javascript.

When i am looking at the source of default2.aspx it's not there (although
ScriptManager line is in aspx with EnablePageMethods=true).

What am I missing? What could be the reason PageMethods not being defined.

thanks

George.