For it to work, I had to split the string and send it.
otherwise, it did not work
copy and principal string split:------
webconcopia1 = webcon1;
webconcopia2 = webcon2;
webconcopia3 = webcon3;
replace values--------------------------------------------------------------------------
webconcopia1.replace("VAR1", " checked=\"checked\" ");
webconcopia1.replace("VAR2", "");
webconcopia1.replace("VAR3", "");
webconcopia1.replace("VAR4", " checked=\"checked\" ");
webconcopia1.replace("VAR5", "");
webconcopia2.replace("VAR6", "value=4");
webconcopia2.replace("VAR7", "value=TEXT");
webconcopia2.replace("VAR8", "value=1234");
webconcopia3.replace("VAR9", "value=1234");
webconcopia3.replace("VAR10", "value=1234");
webconcopia3.replace("VAR11", "value=100");
----------------------------------
SEND ZONE
webServer.sendContent(webconcopia1);
webServer.sendContent(webconcopia2);
webServer.sendContent(webconcopia3);
webServer.send(200, "text/html", webcon4); <-----END HTLM BODY
I do not know why you can not with such a simple page 11K (9.919 carateres with spaces included)