Ive just bought the above expansion for Cakewalk Sound Centre I have X1 Essential The piano samples show within the sound centre but when I try to play them it says "IDS Multisample Not Found in text resource Grand piano mf.sfz can someone help as I am totally lost!

I had this problem myself this week.  I have multiple Sonar instances (MC5, MC5, SHS7, X1 Essential, etc) and WIndows 7 x64.  It was installing under the 32 bit program files directory, but runnung the 64 bit CSC.
 
I Changed the selection of "components to install" in the DSF Steinway install and that seemed to correct the situation (although I went through a lot of other gyrations before that that may have had an effect). 
 
 
 

any ideas how i do that? Im a novice if im honest - this is a whole new world to me at the minute! Do I install it in a different way?

I had the same problem and I believe it was due to having the Cakewalk Sound Center installed in the Program Files (x86) folder instead of the Program Files folder since I am using Windows 7 64-bit. I believe I uninstalled it and then reinstalled in the Program Files folder and that resolved the problem. 

it doesnt give any options to where it is installed I am totally lost I must have installed the damn thing 15 times

Copy of move the folder from the Program Files x86 folder to the one in Program Files. 

PROBLEM SOLVED, DSF WORLD INSTRUMENTS EXPANSION
 
With World Instruments expansion, there is no custom install available. The expansion installs to the Program Files folder. I've been a Cakewalk user since DOS and I still have a 32 bit version on my machine. Both the 64 bit Sonar and the 32 bit Sonar use the 32 bit folder, which did not get the expansion. I copied (merged) the 64 bit Sound Center to the 32 bit folder in Program Files (x86).

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