Adb Push Permission Denied

I am trying to enable the SystemTap on Nexus S Samsung phone, however, no matter what I did, I just can not upload the files into the "/data" folder.

The following are what I did:
1. Root the phone by following video on link:
How To: Root the Samsung Nexus S (Updated 01.20.11) | TheUnlockr
2. Download the Nexus S kernel code by:
git clone http://github.com/CyanogenMod/android_kernel_samsung_c1.git kernel
3. Add debug flags and modify ptrace.h as mentioned in:
Systemtap - OMAPpedia
4. Reboot the phone with new kernel:
fastboot flash zimage zImage

The following are the problems I met:

When I try to push any file, it either tells me the file does not exit, or permission denied. For example:
sudo ./adb push /data/systemtap-1.5-macharm/ bin/staprun /data/staprun
failed to copy '/data/systemtap-1.5-macharm/bin/staprun' to '/data/staprun': Permission denied
or
./adb push /data/systemtap-1.5-macharm/ /data/systemtap-1.5-macharm/
push: /data/systemtap-1.5-macharm/libexec/systemtap/stap-env -> /data/systemtap-1.5-macharm/libexec/systemtap/stap-env
failed to copy '/data/systemtap-1.5-macharm/libexec/systemtap/stap-env' to '/data/systemtap-1.5-macharm/libexec/systemtap/stap-env': No such file or directory

I first guess that is the problem of the "ro" of file systems, so I remount them to be:
rootfs / rootfs rw,relatime 0 0
tmpfs /dev tmpfs rw,relatime,mode=755 0 0
devpts /dev/pts devpts rw,relatime,mode=600 0 0
proc /proc proc rw,relatime 0 0
sysfs /sys sysfs rw,relatime 0 0
none /acct cgroup rw,relatime,cpuacct 0 0
tmpfs /mnt/asec tmpfs rw,relatime,mode=755,gid=1000 0 0
tmpfs /mnt/obb tmpfs rw,relatime,mode=755,gid=1000 0 0
none /dev/cpuctl cgroup rw,relatime,cpu 0 0
/dev/block/mtdblock4 /cache yaffs2 rw,nosuid,nodev,relatime 0 0
/dev/block/mtdblock6 /efs yaffs2 rw,nosuid,nodev,relatime 0 0
/dev/block/platform/s3c-sdhci.0/by-name/system /system ext4 rw,relatime,barrier=1,data=ordered 0 0
/dev/block/platform/s3c-sdhci.0/by-name/userdata /data ext4 rw,nosuid,nodev,noatime,barrier=1,data=ordered 0 0
/sys/kernel/debug /sys/kernel/debug debugfs rw,relatime 0 0
/dev/block/vold/179:3 /mnt/sdcard vfat rw,dirsync,nosuid,nodev,noexec,relatime,uid=1000,gid=1015,fmask=0702,dmask=0702,allow_utime=0020,codepage=cp437,iocharset=iso8859-1,shortname=mixed,utf8,errors=remount- ro 0 0
/dev/block/vold/179:3 /mnt/secure/asec vfat rw,dirsync,nosuid,nodev,noexec,relatime,uid=1000,gid=1015,fmask=0702,dmask=0702,allow_utime=0020,codepage=cp437,iocharset=iso8859-1,shortname=mixed,utf8,errors=remount- ro 0 0
tmpfs /mnt/sdcard/.android_secure tmpfs ro,relatime,size=0k,mode=000 0 0

However, the problem is still there.

Is this the problem of my method of Root the phone? Why I just can not push the SystemTap tools into the "/data" folder?

Any hint would be warmly welcomed.

Yours
Sincerely