Question: Solving a transcendental equation

I should need to solve the transcendental equation below in the unknown  theta0(k+1) , I am not 
able (Warning...). Is there any trick to solve it ? Why in this case Maple output is:
Warning, solutions may have been lost ????
 

solve(0.4254750000e-2*theta0(k+1)/DT^2+(-0.2500000000*sin(theta0(k+1))*lambda1(k+1)*
DT^2-0.4254750000e-2*theta0(k)-0.4254750000e-2*DT*omega0(k)-1.*DT^2+.2500000000*
cos(theta0(k+1))*lambda2(k+1)*DT^2)/DT^2 , theta0(k+1));
Warning, solutions may have been lost
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