The old valkhelm.zip that you could download from my mediafire link is outdated, since the data.ini in there still says "adata.grf", and not "abdata.grf", and doesn't include a "rdata.grf" entry.
Make sure your data.ini says:
[data]
0=abdata.grf
1=rdata.grf
2=sdata.grfand if you want to use the valkhelm.grf, change it to:
[data]
0=valkhelm.grf
1=abdata.grf
2=rdata.grf
3=sdata.grf
No need to reinstall anything.