It's probably a simple solution.

With the Infinite Plane selected (or whatever you have the water material appied to), either keyboard Ctrl+M or click the little "M" in the small white box that appears in your main gui.

This will take you to your Materials Lab, and you can increase the Bump value wit the slider, or click on the value and type a new value in. The Bump value is the only attribute that can go higher than the what the slider will take it, which is 100. You can manually type in values up to 999.

If THAT is not your problem, it could be that the material itself does not have its bump attribute activated. For that....it would be easier to make a screenshot, hold on....

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