ram issues?

Currently running Vista Business 64 bit, with 4gb of ram. Vista, the bios, everything recognizes 4gb of ram. However, Task Manager, shows thatI'm currently using 1.08gb of memory, and that, is 43% of my total system memory. Last time I counted, 40% of 4 wasnt 1.. What gives? Any ideas?

Start | Type msconfig in the Start Search field , and hit Enter | "BOOT" tab | "Advanced Options" button | In the Advanced Options window make certain that the checkbox for Maximum memory is clear, and that there is no value entered in the data box for this line.

That did it. Which is extremely weird too.. It hasnt always been that way. Wonder how it got set. Much appreciated redduc