Help w/installing Red Hat Linux 7.2

Se oproščam ker ni v SLO ampak nisem imel časa prevajat
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I have a 40GB disk! Which is set to partitions: 1=10GB (WinXP Fat32), 2=26GB (Fat32), 3=4GB (not created-reserved for LINUX)

So then I boot from Linux CD and get to the place where U set partitions! SO I choose “AUTOMATIC PARTITIONING« but I get this error”Could not Allocate requested partitions: Partitioning failed: Could not allocate partitions.” So then I tried manually w/Disk Druid and I get a similar error “Could not Allocate requested partitions: unable to create partition which extends beyond the end of the disk!”

So what can I do about it? I am a total NEWBIE to Linux! Once I installed Red Hat 6.2 on an old Celeron 433 w/3,2GB disk!