why my tooltip didn't hide when I put my TextBox TextMode on Password?

why my tooltip didn't hide when I put my TextBox TextMode on Password?

Hi

I Use Jquery UI Tooltip for my signup form,everything is OK but when I put the text Mode to "Password", The tooltip don't hide ever,even when you press Esc key on keyboard.

what should I do now?

It will be ok when I remove this: TextMode="Password"

but its a necessary part that I can't remove.

My Code:

<asp:TextBox ID="UAtxtPassword" TextMode="Password" ToolTip="Please insert your password!" CssClass="UAtxtPassword" runat="server"></asp:TextBox>