How Delete 2nd Kernel line in Grub?

[imdeemvp]

hello guys,

i reinstalled FC and did updates right away, and also
updated kernel thru yum

when i power my pc Grub gives me 2 kernel lines:

FC (2.4.22-1.2174.nptl << updated kernel
FC (2.4.22-1.2115.nptl first kernel after installation
WinsXP

I tried deleting (=e) the 2 kernel line from the grub but it does not delete

then i tried this and i got the following message from the shell:

[imdeemvp@localhost imdeemvp]$ uname -r
2.4.22-1.2174.nptl
[imdeemvp@localhost imdeemvp]$ rpm -e kernel-2.4.22-1.2115
error: package kernel-2.4.22-1.2115 is not installed
[imdeemvp@localhost imdeemvp]$

can someone tell me how to delete the second kernel line that appears in grub? which is the one i could not remove! thanks a lot!