I see your problem. when you send data or command to LCD driver, you should first pull EN high, then post you data, then pull EN down. the LCD driver takes data when it sees a high to low transition on EN. so your code should be as following:
sendtext:
setb rs
clr rw
setb en
mov data,a
clr en
mov dptr,#01ffh
acall timeout
clr en
ret