The AnalyzeTS package was removed from CRAN, so I haven't run your code, but this error normally means that one of the data objects you've referenced inside aes doesn't have the same number of rows or elements as other data objects. It's difficult to tell where that's happening in your code, but maybe check the length of Var95_norm. Does it have 500 elements like the other vectors you're providing to qplot? More generally, I'd suggest putting all of these vectors into a single data frame and using ggplot (instead of qplot) to generate the plot. Using separate vectors with ggplot2 is prone to problems like this.
Here's a simple example that reproduces the error you're getting:
qplot(x=1:10, y=1:11, geom="line")
# Error: Aesthetics must be either length 1 or the same as the data (11): x