predict.smooth.spline

I'm using R 1.7.0 on linux. With this version of R the package modreg is
automatically loaded at start of session. However attempting to use
predict.smooth.spline() produces Error: couldn't find function
predict.smooth.spline.

The function smooth.spline() is OK. What am I missing?

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I.White
ICAPB, University of Edinburgh
Ashworth Laboratories, West Mains Road
Edinburgh EH9 3JT
Fax: 0131 650 6564  Tel: 0131 650 5490
E-mail: iwhite at staffmail.ed.ac.uk