Gui slider error-value not in in bt min and max

Hi I have a quick question on how to solve this issue. Basically I would like to take the inputs from two edit text boxes and specify them as the min and max of the sliders range. I don't have a problem doing this but as soon as the min is entered the slider disappears because the min is now above the default slider value, which is 0. Is there a way I can auto change the default valuevalue to be above min so I can get past this and actually use the slider?