Asked Spain to give the US some Texas land and promised bring in American settlers.?

You are likely referring to the Adams-Onís Treaty (also known as the Transcontinental Treaty) negotiated during the presidency of James Monroe. Spain did concede territory, but it included Florida and lands up to Oregon for which Spain relinquished its claims. There was no exchange of lands in Texas during 1819 - 1821 when that treaty was negotiated and ratified.