Tkrplot works not

Hi,

I've spent some time in programming R - tcl/tk. 
Today I've updated my R version from 1.6.2 to 1.7.0. 
My programm stops now with two error-messages: 
(How could it be, two errors? The command "stop" produces an error but does really stop
the programm after it, isn't it?)

Loading required package: tcltk 
Error in structure(.External("dotTcl", ..., PACKAGE = "tcltk"), class = "tclObj") : 
        [tcl] couldn't load library "C:/Programme/R/library/tkrplot/libs/tkrplot.dll": 
		this library or a dependent library could not be found in library path.
Error in library(tkrplot) : .First.lib failed

The library tkrplot is installed! I used it under version 1.6.2 several times.

In the "Windows-specific changes to R" on CRAN I've seen that:

"Tcl/Tk 8.4.1 is bundled in rw1070.exe.  You can still use your own
installation of Tcl/Tk: see the rw-FAQ."

So, I uninstall my tcl-version. But there are still the same errors.  

Why couldn't R load the tkrplot-library?