combobox and listbox search engine

Hi,

i'd like to create a search engine based on my data in excel, I dont know if this can be done without using userform but if not i'll accept the userform method.
Actually I have 2 problems on these workbook, first is the populating the combobox to Data!a1:f1, it seems it's not working when I put in properties but when i use a1:a6 it's working, weird ;(. the second is the search engine. Hoping that someone can help me on these workbook.

Thanks a lot

anyone that can help me here?