Help R4i

Hello Guys,First, I don't american, and I never make any english course, so, sorry for my bad english.Well, let's go to the problem:My sister win a Nintendo DSi 1.4.1u and... a r4i revolution v1.4 [to see the box of r4i, write "r4i gold upgrade revolution" without ""]( the symbol is of Star Wars Lethal Alliance).Obviously, the r4i 1.4 don't will work on the DSi 1.4.1u.By this way, I need help to find the firmware to upgrade her r4i.One more thing: my friend loan to me him Nintendo DSLite, that's funny because my r4i run on him DS (the system is v1.4)Well, Could anyone help me? Again, sorry my trash english...
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Nobody can help me? Y.Y

Which R4 card do you have? You need to find the official site and download the correct firmware for the lfashcard, then it can work on your DSi again.