on 09-11-2012 08:33 AM
Sherwood is a Linden Home sim so you are restricted to 117 prims which is the normal for a 512 sq.m. parcel (the house doesn't count against prim total on Linden Home parcels).
You have either rezzed too many objects or using high prim ones. Check the land impact of any furniture or other objects you already have rezzed in your home by right clicking it > selecting edit then checking its impact which can be seen lower left of the edit window. If you find some that are too high, remove them and buy low prim replacements instead.
on 09-11-2012 06:27 AM
Mandji is quite right. Click the Land icon at the top of your viewer screen or click World >> About Land. Then click the Objects tab to see what your prim allowance is and how many prims you have already rezzed. That's your budget. You have to learn to stay within it or move to a larger parcel of land somewhere.