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you could try using the search function and searching for blank page after install..
sorry, but this question gets asked numerous times a day every day and people get tired of repeating themselves..
a likely hint tho, check folder permissions and make sure templates_c, cache, uploads are chmod 777
there could be a number of reasons, but most of the blank page problems on this forum that have already been asked and answered are likely to give you the help you need :)
other than that.. Welcome to the wonderful world of Xoops, and i hope the blank page doesn't put you off or my comment above.. i'm sure you'll find the solution tho..
you can't get a better community than what you will find here :)