My daughter ds is not reading card?

Assuming your are in the USA try here:
http://www.consoleshop.com/home.php?cat=303
http://powergamingparts.com/nintendo-ds.html

In the UK:
http://www.ps2laser.co.uk/ds-lite-repair-parts-spares-accessories/DS%20Lite%20parts/c/118/143

A quick search of google shows:
http://www.google.com.au/search?hl=en&safe=off&q=ds+parts+usa&meta=

Try one of the dealers on ebaY:
http://shop.ebay.com.au/?_from=R40&_trksid=m38&_nkw=ds+parts&_sacat=See-All-Categories

Steve
June 2009