build uclinux error

[root@localhost RPMS]# rpm -Uvh ncurses*.rpm

warning: ncurses-5.3-4.i386.rpm: V3 DSA signature: NOKEY, key ID db42a60e

Preparing... # ########################################## [100%]

package ncurses-5.3-4 is already installed

then i execute the command:make menuconfig

this is the information :

[wangdengke@localhost uClinux-dist-test]$ make menuconfig

config/mkconfig > config.in

/bin/sh: line 1: config.in: 权限不够

make: *** [config.in] Error 1

[wangdengke@localhost uClinux-dist-test]$

thx!