don't click the marble in the Transparency row.

do click the marble in the bump row.

in my ancient tutorial on using pictures as material components, I don't use the "alpha channel" at all - I load them in all as separate pictures.  so, you may have to take your alpha channel out completely and load it as a separate picture, as it may automagically just think, "ah, there's an alpha channel which means transparency, so I'll ignore the setting of the transparency row and use the alpha channel regardless." -- in which case, you can probably use a "nothing" material and override the transparency....

http://calyxa.best.vwh.net/~calyxa/pearl/materialtut/picts.html

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