关于staad 分析中的问题

在用staad分析时，碰到 *** STAAD-2D ERROR ***

SPACE FRAME,SOLID AND PLATE ELEMENT,DYNAMIC ANALYSIS

ARE NOT AVAILABLE IN STAAD-2D 然后就进不了后处理程序，请大侠给予解答，谢谢

以下是模型命令：
JOB NO 001
JOB PART structure
ENGINEER DATE 02-Nov-12
END JOB INFORMATION
UNIT METER KN
JOINT COORDINATES
1 0 0 0
2 0 9 0
3 10 9 0
4 10 0 0
MEMBER INCIDENCES
1 1 2
2 2 3
3 3 4
DEFINE MATERIAL START
ISOTROPIC STEEL
E 2.05e+008
POISSON 0.3
DENSITY 76.8195
ALPHA 1.2e-005
DAMP 0.03
END DEFINE MATERIAL
MEMBER PROPERTY CHINESE
2 TABLE ST I40A
1 3 TABLE ST I50A
CONSTANTS
MATERIAL STEEL ALL
SUPPORTS
1 FIXED
4 PINNED
LOAD 1 LOADTYPE Dead TITLE DEAD + LIVE
MEMBER LOAD
2 UNI GY -2.5
LOAD 2 LOADTYPE Wind TITLE WL FROM LEFT
JOINT LOAD
2 FX 10
LOAD COMB 3 75 percent of (DL+LL+WL)
1 0.75 2 0.75
PERFORM ANALYSIS
FINISH