DES_ede3_cbc_encrypt Maximum Text Length?

[Brandon Shaw]

I am interacting with DES encryption at a fairly superficial level, but it has 
been working for some time.  Now I am trying to encrypt a slightly longer text 
string and am running into a problem.  It works well until my text length 
exceeds about 8 KB and then it simply truncates the input and encrypts that.  
How can I handle this?  I haven’t found much by Googling.