Well if its in two weeks, you have time to practice. Everday this is what you do:
1. Play through the whole scale slowly
2. Play through the whole thing at a walking tempo
3. Play through it all as fast as you can
4. Take the C#-G VERY SLOWLY a couple of times
5. Take the C#-G and play it faster each time
6. Play the whole thing again from slow to fast

**You can do each step as many times as you need to**

I hope this helps you and good luck and tell us later how your tryouts went!

Another thought is this:

1. Play the chromatic from fourth space E to one line above A.
2. Play it again.
3. When you can play that quite fast - then remove your LH pointer for the whole exercise.
C#-F# is just like the E to A only it`s missing one finger. Then all you have to do is work on adding the G.

Chromatically Yours,
Dennis